Calender-machine.



PATENTED MAYZ, 1903. J. KLEINEWEFERS.

GALBNDER MACHINE.

APPLICATION FILED FBB.18. 1901.

No. 728,937. PATENTE) MAY Z6, A1903.

JQ KLEINEWEFERS.

GVAALENDER MACHINE.

APPLICATION FILED '.EEB. 18, 1901. N0 MODEL. y 3 SHEETS-SHEET 2.

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No. 728,937. l PATBNTED MAY 26, 1903.

' J. KLBINBWBPERS.

GALENDBR MACHINE.

l APPLICATION FILED FEB.18. 1901. l0 MODEL. 8 SHEETS-SHEET 3.

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l pressure-cylinders at the side or at the bot- UNiTEn STATES Patented May 26, 1,903.

JOHANNES KLEINEVEFERS, OF KREFELD, GERMANY, ASSIGNOR TO JOH.

KLEINEWEFERS SOI-INE, OF KREFELD, GERMANY, A FIRM.

CALENDER-IVIACHINE.

SLEEGIFICATON forming part of Letters Patent 1\T o. 728,937, dated May 26, 1903.

Application tiled February 18,1901. erial No. l7,846. (No model.)A

T @ZZ whom/ t 17mg/ concern:

Be it known that I, JOHANNES KLEINEWE- FERS, manufacturer, a subject of the King of Prussia., Emperor of Germany, residing in the city of Krefeld,Rhenish Prussia, German Empire, have invented certain new and useful Improvements in Oalender-Machines,of which the following is a specification.

In calenders as heretofore constructed the pressure upon the trunnions of the rollers was either produced by means of levers or by applying hydraulic pressure, in which latter case the pistons of the pressure-cylinders arranged within the frame of the machine acted directly upon the trunnions of the calenderrollers. The employment of hydraulic pressurein calender-rollers, while it has many ad- Vantges which speak in favor of this kind of pressure, still presents the inconvenience that a very excessive pressure is necessary to work a set of such rollers, especially in the manufacture of paper,which in turn necessitates large pressure-cylinders and correspon dingly-large pressure-accumulators.` My invention is intended to obviate these difficulties by diminishing the size of the rollers and the amount of water used in the production of pressure, whereby I am also enabled to decrease the dimensions of the pressure-accumulators. This is effected by the employment of levers in combination with the use of hydraulic pressure, whereby I may produce the same elect as with pressure-creating apparatus of larger size. This is accomplished byarranging the tom of the set of calender-rollers, the pressure of the pistons being transmitted to the compound levers, which are so arranged and constructed that the considerably-increased pressure is only made to operate upon the trunnions of the rollers by the medium of suitable gearing intermediate between these parts.

My invention is shown in the accompanying drawings in side views by way of example as applied to calender-rollers.

In the construction shown in Figure l of the drawings the combined pressure upon the pressure-cylinders is exerted in a downward direction. In the modified form of construction represented in Fig. 2 the pressure is actin'g in an upward direction. This construction is particularly suitable for the purposes of my invention, inasmuch as upon the cessation of pressure the rollers, which are depressed by theirown weight,will leave a space' between each other, which is of great importance in the working and for the life of the calender-rollers. Fig. 3`is a detail of the arrangement of levers shown in Fig. 2.

Similar letters of reference are used for corresponding` parts in the several figures.

The pressure-cylinders employed for the production of the hydraulic pressure are indicated at a and are rigidly attached to the frame of the machine.

In the form of construction shown in Fig. l of the drawings the pressure-cylinder is a1'- ranged in the upper part of the frame of the machine, so as to shorten the length of the levers. upon an adjusting-screw c upon the longer end CZ of the bell-crank lever, which is fulcrumed at e on top of the frame of the machine, the pressure being effected by the head of the shorter arm f of the lever. g is an accumulator for feeding the pressure-cylinder and for insuring a uniformity of pressure in the cylinder. If it is desired to take the pressure off the calender-rollers, the water is emptied from the pressure-cylinder, the piston recedes, which results in the lever ceasing to work, the effect being that the pressure is taken olf the rollers.

In the modified form of construction represented in Fig. 2 of the drawings the pressure of the levers is acting from the bottom in an upward direction. The trunnionsof the bottom rollers are journaled upon the shorter arms of the levers n, which are pivoted at m. The free outer ends of the said levers are connected to the shorter arms of the levers p, pivoted at o. Upon the end of the longer arm of each of these levers I arrange an adjusting-screw c, which receives the impact of the piston b of the pressure-cylinder o. The levers p andnare connected by links r, which may be displaced along the ends of the eX- tremities of the said levers, thus enabling me to change the relation of the lever-arms to each other, thereby also varying the pressure exerted upon the trunnions.

The piston b of each cylinder acts l' ICO While I have here shown the use of leverarms of adjust-able length as a means for Varying the pressure of the levers upon the -trunnions without operating the pressurepumps, I Wish it to be understood that I do not bind myself to this construction, which is but given as an instance of the change of pressure. In fact, I may use other means for varying the pressure. Thus I have shown another instance of arriving at the same result in Fig. 3 of the drawings in a side View. The shaft o, upon which the lever is pivoted which receives the pressure of the piston, is adjustable in a horizontal direction within the said lever. Hence it is obvious that by changing the fulcrum of the lever the pressure upon the trunnion may be considerably increased or diminished without the necessity of submitting the calenders to other manipulations.

From Fig. 3 it will be seen that a gearwheel 0' is keyed to the rigidly -journaled shaft o, upon which the lever is pivoted, the said gear-wheel engaging with teeth cut in the sides of the slot q of the lever p. Upon the rotation of the hand-Wheel r, keyed to the continuation of the shaft o, the fulcrum of l'the lever is changed,which causes a change in the ratio of transmission of power of the two levers. This arrangement shows the further advantage that the shafts of the levers may be dierently adjusted upon both sides of the calenders, so as to balance any irregularity of pressure upon both sides of the set of calender-rollers.

What I claim, and desire to secure by Letters Patent of the United States, is-

1. In calender-machines the combination with hydraulic-pressure cylinders of twoarmed levers, the longer arms of which receive the impact of the pistons of the said pressure-cylinders, wnile the shorter arms transmit the pressure upon the trunnions of the rollers-at an increased ratio, thereby combining the effects of hydraulic pressure With the pressure resulting from the employment of levers.

2. In calender-machines, the combination with hydraulic-pressure cylinders and pistons operating therein, of a series of two-armed levers fortransmitting the pressure from the pistons to the trunnions of the rollers, the length of the lever-arms being adjustable.

3. In calender-machines, the combination with hydraulic-pressure pistons of a suitable number ot' levers for transmitting the pressure to the trunnions of the rollers, and means y to change the fulcrum of the lever receiving the impact of the pressure-piston, substantially as described.v

4. In calender-machines, in combination with hydraulic-pressu re cylinders and pistons operating therein, of a single lever for the transmission of pressure to the rollers, and means to adjust the position of the shaft upon which the said lever is pivoted, substantially as described.

In Witnesswhereof I have hereunto signed my name in the presence of two subscribing witnesses.

JOH. KLEINE'WEFERS.

Witnesses:

FR. PANNEZ, H. HALL. 

